Cisco DTA Control System (DTACS) 4.0.0.9 and Cisco Headend System Release allow remote attackers to cause a denial of service (CPU and memory consumption, and TCP service outage) via (1) a SYN flood or (2) other TCP traffic flood, aka Bug IDs CSCus50642, CSCus50662, CSCus50625, CSCus50657, and CSCus68315.